The figure below shows a Paramecium, a single-celled freshwater protist. The hairlike structures visible on the Paramecium allow it to move. These structures are ________.
A) microfilaments
B) intermediate filaments
C) flagella
D) cilia
Answer: D) cilia
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Conifer resin has what properties?
_____ It hardens on contact with air. _____ It flows through ducts in the wood and leaves. _____ It forms amber, often trapping insects and other organisms. _____ It attracts insects and other organisms that facilitate reproduction. _____ It can prevent attack by herbivores and pathogens.
The duplication of the complete set of chromosomes in an organism's cell, followed by the separation
of the duplicated chromosomes into two new cells is known as ____.
a. mitosis b. cytokinesis c. binary fission d. meiosis e. fertilization
The zygote goes through ____ to become a(n) ____
a. cleavage; blastula b. cleavage; gastrula c. zygote formation; embryo d. cleavage; egg e. fertilization; blastula
Which of the following statements concerning enzymes is FALSE?
A) They are usually, but not always, proteins. B) They always function best at 37°C. C) They can be denatured if the pH of their environment is too high or too low. D) They form a temporary intermediate compound with a substrate. E) They can be used to catalyze a chemical reaction over and over again.